軽井沢マジック

Mizuno Satoru, temporary deputy supervisor of a travel agency, and Minami Yukari, one of this agency's employees, get caught up as suspects in various murder cases in Karuizawa's area by coincidence and end up forced to make sense of these peculiar murders to prove their own innocence.

武家屋敷の殺人

On their investigation of Shizunai Mizuki's birthplace, attorney Kawajima Koujirou and his friend Naka Kunihiko, with the only clues being the diary and a letter from her uncle, stumble upon a murder and the mystery of a resurrecting mummy from 20 years ago. Following their investigations, another murder occurs...

十角館の殺人

Tsunojima, Aoyashiki's burnt down remains and a decagon-shaped guesthouse. The latter is used by seven students from a university's mystery club and as someone would naturally expect considering this setting, serial murders start happening on this otherwise uninhabited island with no one willing to confess the crimes. Two other students who did not visit the island with their fellow students receive mysterious letters from Nakamura Seji, the proprietor of former Aoyashiki and the whole island, who supposedly died in the incident in the mansion half a year ago. They find out that those letters were also sent to their meanwhile absent fellow students and they begin investigating the incident of Tsunojima's past...